RRM measurement method, measurement system, terminal and base station

Abstract

An RRM measuring method of an LTE system in an unlicensed frequency band, a system, a terminal and a base station are provided. The method includes: receiving a downlink signal sent by each base station in at least one base station to determine a busy/idle status of an uplink channel and/or a downlink channel of each base station; calculating a value of RSRQ of each base station, when the uplink channel and/or the downlink channel of each base station is in a busy state or in an idle state; reporting the values of RSRQ to a service base station. The present disclosure measures the values of RSRQ according to the channel statuses of the base station, thus the serving base station determines the service performance of a neighboring base station to select a more appropriate auxiliary cell base station or a target base station when switching.

What is claimed is: 
     
       1. A computer-implemented Radio Resource Management (RRM) measurement method of Long Term Evolution (LTE) system working in an unlicensed frequency band, the RRM measurement method being applicable to a terminal, and comprising:
 receiving a downlink signal sent by each base station in at least one base station, and determining a busy/idle state of an uplink channel and a downlink channel of each base station according to the downlink signal; 
 calculating a value of a reference signal reception quality corresponding to each base station when the uplink channel and the downlink channel of each base station is in a busy state, and calculating a value of the reference signal reception quality corresponding to each base station when the uplink channel and the downlink channel of each base station is in an idle state; 
 reporting to a service base station of the terminal, the value of the reference signal reception quality when the uplink channel and the downlink channel of each base station is in a busy state and the value of the reference signal reception quality when the uplink channel or the downlink channel of each base station is in an idle state; 
 measuring a value of a reference signal reception power corresponding to each base station when the uplink channel and the downlink channel of each base station is in a busy state, and measuring a value of the reference signal reception power corresponding to each base station when the uplink channel and the downlink channel of each base station is in an idle state; and 
 reporting the value of the reference signal reception power corresponding to each base station when the uplink channel and the downlink channel of each base station is in a busy state and the value of the reference signal reception power corresponding to each base station when the uplink channel and the downlink channel of each base station is in an idle state to the service base station. 
 
     
     
       2. The RRM measurement method of an LTE system working in an unlicensed frequency band according to  claim 1 , further comprising:
 calculating a busy/idle ratio of the uplink channel and the downlink channel of each base station, and reporting the busy/idle ratio of the uplink channel and the downlink channel of each base station to the service base station. 
 
     
     
       3. The RRM measurement method of an LTE system working in an unlicensed frequency band according to  claim 1 , wherein determining the busy/idle state of the uplink channel and the downlink channel of each base station according to the downlink signal comprises:
 detecting a period of sending a reference signal by each base station; 
 determining that the uplink channel and the downlink channel of any base station is in a busy state, when the period of sending the reference signal by any base station in the at least one base station is greater than or equal to a predetermined period; and 
 determining that the uplink channel and the downlink channel of any base station is in an idle state, when the period of sending the reference signal by any base station in the at least one base station is less than the predetermined period. 
 
     
     
       4. The RRM measurement method of an LTE system working in an unlicensed frequency band according to  claim 1 , wherein determining the busy/idle state of the uplink channel and the downlink channel of each base station according to the downlink signal comprises:
 determining that the uplink channel and the downlink channel of any base station is in an idle state, when a resource reservation signal sent by any base station in the at least one base station or a signal indicating that the uplink channel and the downlink channel of any base station is in an idle state is received. 
 
     
     
       5. The RRM measurement method of an LTE system working in an unlicensed frequency band according to  claim 1 , wherein determining the busy/idle state of the uplink channel and the downlink channel of each base station according to the downlink signal comprises:
 determining that the uplink channel and the downlink channel of each base station is in a busy state, when receiving an instruction indicating that the micro cell base station is closed by any base station in the at least one base station. 
 
     
     
       6. The RRM measurement method of an LTE system working in an unlicensed frequency band according to  claim 1 , further comprising:
 determining, by the service base station, a service performance of each base station according to the value of the reference signal reception quality obtained when uplink channel and downlink channel of each base station is in a busy state and the value of the reference signal reception quality obtained when uplink channel and downlink channel of each base station is in an idle state. 
 
     
     
       7. The RRM measurement method of an LTE system working in an unlicensed frequency band according to  claim 6 , further comprising:
 a target base station to provide services to the terminal according to the service performance of the at least one base station when there is a need to switch to the target base station to provide services to the terminal; and/or 
 selecting a target base station as an auxiliary cell base station according to the service performance of the at least one base station. 
 
     
     
       8. The RRM measurement method of an LTE system working in an unlicensed frequency band according to  claim 7 , wherein the selecting a target base station to provide services to the terminal comprises any one or more of the following combinations:
 selecting the base station having the maximum value of the received reference signal reception quality obtained when the uplink channel and the downlink channel is in a busy state as the target base station to provide services to the terminal; selecting the base station having the maximum value of the received reference signal reception quality obtained when the uplink channel and the downlink channel is in an idle state as the target base station to provide services to the terminal; and 
 selecting the base station with the maximum busy/idle ratio of the uplink channel and the downlink channel as the target base station to provide services to the terminal. 
 
     
     
       9. A terminal, comprising a communication bus, an input device, an output device, a memory and a processor, wherein:
 the communication bus is used for realizing connection communication among the input device, the output device, the memory and the processor; 
 the memory stores a set of program codes, and the processor retrieves the program codes stored in the memory and executes the following operations: 
 receiving, by the input device, a downlink signal sent by each base station in at least one base station, and determining a busy/idle state of the uplink channel and the downlink channel of each base station according to the downlink signal; 
 calculating a value of the reference signal reception quality corresponding to each base station when the uplink channel and the downlink channel of each base station is in a busy state, and calculating a value of the reference signal reception quality corresponding to each base station when the uplink channel and the downlink channel of each base station is in an idle state; 
 reporting to a service base station of the terminal, by the output device, the value of the reference signal reception quality when the uplink channel and the downlink channel of each base station is in a busy state and the value of the reference signal reception quality when the uplink channel and the downlink channel of each base station is in an idle state; 
 wherein the determining a busy/idle state of the uplink channel and the downlink channel of each base station according to the downlink signal comprises:
 detecting a period of sending a reference signal by each base station; 
 determining that an uplink channel and a downlink channel of any base station is in a busy state, when the period of sending the reference signal by any base station in the at least one base station is greater than or equal to a predetermined period; and 
 determining that an uplink channel and a downlink channel of any base station is in an idle state, when the period of sending the reference signal by any base station in the at least one base station is less than the predetermined period. 
 
 
     
     
       10. The terminal according to  claim 9 , wherein the processor is further configured to perform the following operations:
 calculating a busy/idle ratio of the uplink channel and the downlink channel of each base station, and reporting, by the output device, the busy/idle ratio of the uplink channel and the downlink channel of each base station to the service base station. 
 
     
     
       11. The terminal according to  claim 9 , wherein the processor is further configured to perform the following operations:
 measuring a value of the reference signal received power corresponding to each base station, when the uplink channel and the downlink channel of each base station is in a busy state and/or an idle state; 
 reporting to the service base station, by the output device, the value of the reference signal reception power corresponding to each base station. 
 
     
     
       12. The terminal according to  claim 9 , wherein the processor determines the busy/idle state of the uplink channel and the downlink channel of each base station according to the downlink signal comprises:
 determining that the uplink channel and the downlink channel of any base station is in an idle state, when a resource reservation signal sent by any base station in the at least one base station or a signal indicating that the uplink channel and the downlink channel of any base station is in an idle state is received. 
 
     
     
       13. The terminal according to  claim 9 , wherein the processor determines the busy/idle state of the uplink channel and the downlink channel of each base station according to the downlink signal comprises:
 determining that the uplink channel and the downlink channel of each base station is in a busy state, when receiving an instruction indicating that the micro cell base station is closed by any base station in the at least one base station. 
 
     
     
       14. A base station, the base station comprising a communication bus, an input device, a memory and a processor, wherein:
 the communication bus is used for realizing connection communication between the input device, the memory and the processor; 
 the memory stores a set of program codes, and the processor retrieves the program codes stored in the memory and executes the following operations: 
 receiving, by the input device, a value of a reference signal reception quality corresponding to each base station in at least one base station, obtained when uplink channel and downlink channel of each base station is in a busy state, and a value of the reference signal reception quality corresponding to each base station in the at least one base station, obtained when the uplink channel and the downlink channel of each base station is in an idle state, reported by a terminal; 
 determining a service performance of each base station according to the value of the reference signal reception quality obtained when the uplink channel and the downlink channel of each base station is in a busy state and the value of the reference signal reception quality obtained when the uplink channel and the downlink channel of each base station is in an idle state; 
 selecting the target base station to provide services to the terminal according to the service performance of the at least one base station when there is a need to switch to the target base station to provide services to the terminal, comprising any one or more of the following combinations:
 selecting the base station with the maximum value of the received reference signal reception quality obtained when the uplink channel and the downlink channel is in a busy state as the target base station to provide service to the terminal; 
 selecting the base station with the maximum value of the received reference signal reception quality obtained when the uplink channel and the downlink channel is in an idle state as the target base station to provide service to the terminal; and 
 selecting the base station with the maximum busy/idle ratio of the uplink channel and the downlink channel as the target base station to provide services to the terminal. 
 
 
     
     
       15. The base station according to  claim 14 , wherein the processor is further configured to perform the following operations:
 receiving, by the input device, a busy/idle ratio of the uplink channel and the downlink channel of each base station reported by the terminal, and/or a busy/idle ratio of the uplink channel and the downlink channel of other base stations reported by the other base stations; and 
 determining the service performance of each base station and/or the other base station, according to busy/idle ratio of the uplink channel and the downlink channel of each base station and/or the busy/idle ratio of the uplink channel and the downlink channel of the other base stations. 
 
     
     
       16. The base station according to  claim 14 , wherein the processor is further configured to perform the following operations:
 selecting a target base station serving as an auxiliary cell base station according to the service performance of the at least one base station. 
 
     
     
       17. The base station according to  claim 14 , wherein the processor is further configured to perform the following operations:
 indicating that the terminal measures the reference signal reception quality at a designated time-frequency location.